Complete pi-facial diastereoselectivity in Diels-Alder reactions of dissymmetric 2,4-cyclohexadienones |
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| Authors: | Hou Hui-Fang Peddinti Rama Krishna Liao Chun-Chen |
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| Institution: | Department of Chemistry, National Tsing Hua University, Hsinchu 300, Taiwan, Republic of China. |
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| Abstract: | reaction: see text] The studies in the Diels-Alder reactions of 5-methoxy-masked o-benzoquinone (1a, R = OMe) and simple dissymmetric 2,4-cyclohexadienones 1b-e with methyl vinyl ketone, styrene, and benzyl vinyl ether are described. The dienones 1b-e reacted with dienophiles to form syn adducts (dienophile approach is syn to allylic methoxy group) exclusively. |
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